Color tables

About

Color tables live in $GISBASE/etc/colors (see SVN)

Modules

• r.colors (r.colors manual in GRASS 7 has colors tables embedded as well as the GUI dialog)
• r.colors.stddev (samples)
• r.colors.out
• r3.colors (GRASS 7 only)
• r3.colors.out (GRASS 7 only)
• v.colors
• v.colors.out (GRASS 7 only)

• d.legend
• d.colortable

Addons

• User contributed color rules in the GRASS Addons repository
• Convert from GMT color tables with r.cpt2grass
• Use r.colors.quantiles to create raster colors rules based on n-quantiles. It uses the R and the spgrass6 package.
• Use r.colors.out_sld to export GRASS raster colors rules in OGC SLD template v1.0.0 XML format for Geoserver and the ilk
• Use r.colors.out_vtk to export GRASS raster colors rules for use with VTK-based visualization software.

Repositories

• There is an online colormap repository with many fine GMT (and many others) gradients at

http://soliton.vm.bytemark.co.uk/pub/cpt-city/

• There are a number of command line tools for working with the GMT .cpt files at

http://soliton.vm.bytemark.co.uk/pub/jjg/en/code/cptutils/

Examples

Built in

The numeric values of following color tables can be found in the here

Addons

These user contributions can be found in the GRASS addons SVN repository

• The script used to create these thumbnails can be found on the discussion page.